package com.blog.common.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtParser;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import io.jsonwebtoken.io.Decoders;
import io.jsonwebtoken.security.Keys;
import lombok.extern.slf4j.Slf4j;

import java.nio.charset.StandardCharsets;
import java.security.Key;
import java.util.Base64;
import java.util.Map;
@Slf4j


public class JwtUtils {

    private static String SECRET_STRING="tyljstkjpMP9qaHaZctki26FYksNixXlhZBdyDqjmyU=";
//    private static  Key key= Keys.hmacShaKeyFor(SECRET_STRING.getBytes(StandardCharsets.UTF_8));
    private static Key key= Keys.hmacShaKeyFor(Decoders.BASE64.decode(SECRET_STRING));

    public static String genToken(Map<String,Object>claims){
        String compact= Jwts.builder()
                .setClaims(claims)
                .signWith(key)
                .compact();
        return compact;
    }

    public static Object parseToken(String token){
        if(token==null){
            return null;
        }
        JwtParser builder = Jwts.parserBuilder().setSigningKey(key).build();
        Claims claims=null;
        try{
            claims=builder.parseClaimsJws(token).getBody();
        }catch (Exception e){
            log.error("token解析失败,token:"+token);
        }
        return claims;
    }

}
